Photo showing three different gas tubes used by Colt…rifle length, carbine length and LE6940 series.
The Colt AR-15 Resource
"A site dedicated to the history of the Colt AR-15 rifles, carbines and associated items"
Photo showing three different gas tubes used by Colt…rifle length, carbine length and LE6940 series.
The Colt AR-15 Resource 